| 释义 |
paraheliotropism Bot.|ˌpærəhiːlɪˈɒtrəpɪz(ə)m|
[f. as prec. + -ism.]
A tendency in plants when exposed to brilliant light to turn their leaves parallel to the incidence of the light-rays.
1881Darwin in Nature XXIII. 409/1 This remarkable movement I have called paraheliotropism. Ibid., F. Müller doubts whether so strongly marked a case of paraheliotropism would ever be observed under the duller skies of England. |